Cyber Posture

CVE-2021-47757

HighPublic PoC

Published: 15 January 2026

Published
15 January 2026
Modified
23 January 2026
KEV Added
—
Patch
—
CVSS Score 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0064 70.7th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Description

Chikitsa Patient Management System 2.0.2 contains an authenticated remote code execution vulnerability in the backup restoration functionality. Authenticated attackers can upload a modified backup zip file with a malicious PHP shell to execute arbitrary system commands on the server.

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match
prevent

Validates the content and structure of uploaded backup ZIP files to prevent inclusion of malicious PHP shells that enable remote code execution.

SI-3 Malicious Code Protection good match
preventdetect

Deploys malicious code protection mechanisms to scan and block ZIP files containing PHP shells during upload or extraction in the backup restoration process.

AC-6 Least Privilege partial match
prevent

Enforces least privilege to restrict backup restoration functionality to only necessary high-privilege accounts, mitigating exploitation by low-privilege authenticated attackers.

Security SummaryAI

CVE-2021-47757 is an authenticated remote code execution vulnerability in Chikitsa Patient Management System version 2.0.2. The issue affects the backup restoration functionality, allowing attackers to upload a modified backup ZIP file containing a malicious PHP shell.

Authenticated attackers with low privileges can exploit this vulnerability over the network with low attack complexity and no user interaction. Exploitation enables execution of arbitrary system commands on the server, resulting in high impacts to confidentiality, integrity, and availability, as reflected in the CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and mapped to CWE-434.

References point to the project's GitHub repository at https://github.com/sanskruti-technologies/chikitsa, SourceForge page at https://sourceforge.net/projects/chikitsa/, official site at https://www.chikitsa.io/, and an Exploit-DB entry at https://www.exploit-db.com/exploits/50572. No specific mitigation or patch details are detailed in the provided information.

Details

CWE(s)
CWE-434

Affected Products

chikitsa
patient management system
2.0.2

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1505.003 Web Shell Persistence
Adversaries may backdoor web servers with web shells to establish persistent access to systems.
attack.mitre.org →
Why these techniques?

The vulnerability enables exploitation of a public-facing web application (T1190) via authenticated upload of a malicious ZIP containing a PHP web shell (T1100), directly facilitating remote code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References